http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-923463-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-224 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-22 |
| filingDate | 1961-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1963-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-923463-A |
| titleOfInvention | Recovery of hexamethylphosphorictriamide |
| abstract | A process for the recovery of hexaethylphosphorictriamide from a reaction mixture resulting from the reaction of dimethylamine with a phosphorus oxyhalide in an organic solvent comprises (1) contacting the reaction mixture with aqueous alkali metal hydroxide in proportions such that the aqueous hydroxide phase obtained will contain from 5 to 15 weight per cent. of the alkali metal hydroxide and is sufficient to dissolve the alkali metal halide resulting from the reaction of the dimethylamine hydrohalide with the hydroxide, either (2) removing the dimethylamine from the mixture and (3) separating the organic phase from the aqueous hydroxide phase at a temperature of 20 DEG C. to the boiling point of the mixture or carrying out step (3) and thereafter carrying out (2) by removing dimethylamine from both of the phases and (4) recovering the hexamethylphosphorictriamide from the organic phase. The reaction mixture may be neutralised with a stoichiometric amount of the alkali metal hydroxide, dimethylamine separated, and the neutralised mixture contacted with a further amount of hydroxide to give the necessary concentration. Dimethylamine may be removed by distillation. The recovery of product may be increased by contacting the aqueous phase with further organic solvent. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2160480-A1 |
| priorityDate | 1960-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 21.